Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb38f052b47d4ef…

MALICIOUS

PDF

43.1 KB Created: 2020-08-14 21:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe9ba3255527eae2d4327ffbe3841fbd SHA-1: 981cd22d0a40c8b9ea89754f25a63939a1005102 SHA-256: dcb38f052b47d4ef14e893c05db7b6a66385012a6f9af9dd4b276c3c85e0b4a2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to a known malicious redirector. Additionally, PDF_SEO_LINK_FARM indicates a large number of external links, many hosted on Shopify, likely to obscure the malicious destination. The document body contains the text 'Andes ruminant crossword answer' and the malicious URL https://ttraff.cc/pify?keyword=andes+ruminant+crossword+answer, suggesting a lure to a malicious site disguised as a puzzle answer. No scripts were extracted from this sample.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=andes+ruminant+crossword+answer
    • http://files.superstudents408.com/uploads/1/3/2/8/132814589/b2a10b0.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93616534700.pdf
    • https://cdn.shopify.com/s/files/1/0436/8472/4889/files/xarenokitep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vonabubabosutogoxofe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7321/files/xutokorizoronikalorujaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0457/5387/files/26720716121.pdf
    • https://cdn.shopify.com/s/files/1/0433/0441/9478/files/vba_excel_tutorial_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0440/6811/0488/files/wuguzisivuligiwesiwufoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/6116/4697/files/dovek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedifoniwupub.pdf
    • https://cdn.shopify.com/s/files/1/0431/4166/0826/files/68751030799.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/raminelu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3766/files/59705740137.pdf
    • https://cdn.shopify.com/s/files/1/0439/1760/7067/files/gusirakiju.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b52.bin
b951f7c4f91c736e68d52c483e7021ea220ca83cb5ece8d076bc7d8fabdd7a3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B52 5132 bytes
font_01_sfnt_off00007cb2.bin
b95fd4140da7900dcb80d9822a8f2bfec7cfb9d51dcbaded9249ed68c64bfadd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB2 10312 bytes

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